Fig. 7

The potential hub genes identified from the co-expression network of the PgHDZ gene family. a Cluster 01 and cluster 02, indicated by different colors, of the PgHDZ gene family co-expression network in four-year-old plant roots of 42 cultivars. The co-expression network was constructed at p ≤ 1.0E-03 and the potential hub genes that were correlated with the largest number of the genes and with a connectivity of larger than 15 are highlighted in red font. b Cluster 01 of the PgHDZ gene family co-expression network in different tissues of a four-year-old ginseng plant. The co-expression network was constructed at p ≤ 1.0E-03 and the potential hub genes that were correlated with the largest number of genes and with a connectivity of larger than 10 are highlighted in red font